GATE Mechanical Engineering Practice Paper 1 Questions And Answers

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Mechanical Engineering Practice Paper 1 Questions & Answers

1. In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate

Mechanical Engineering Practice Paper 1 Questions & Answers

2. Match the following metal forming processes with their associated stresses in the workpiece. Metal forming process Type of stress 1. Coining P. Tensile 2. Wire Drawing Q. Shear 3. Blanking R. Tensile and compressive 4. Deep Drawing S. Compressive

Mechanical Engineering Practice Paper 1 Questions & Answers

3. In an interchangeable assembly, shafts of size mate with holes of size The maximum interference (in microns) in the assembly is

Mechanical Engineering Practice Paper 1 Questions & Answers

4. During normalizing process of steel, the specimen is heated

Mechanical Engineering Practice Paper 1 Questions & Answers

5. Oil flows through a 200 mm diameter horizontal cast iron pipe (friction factor, f = 0.0225) of length 500 m. The volumetric flow rate is 0.2 m3/s. The head loss (in m) due to friction is (assume g = 9.81 m/s2)

Mechanical Engineering Practice Paper 1 Questions & Answers

6. For an opaque surface, the absorptivity (α) , transmissivity (t) and reflectivity (ρ) are related by the equation:

Mechanical Engineering Practice Paper 1 Questions & Answers

7. Steam enters an adiabatic turbine operating at steady state with an enthalpy of 3251.0 kJ/kg and leaves as a saturated mixture at 15 kPa with quality (dryness fraction) 0.9. The enthalpies of the saturated liquid and vapor at 15 kPa are hf = 225.94 kJ/kg and hg = 2598.3 kJ/kg respectively. The mass flow rate of steam is 10 kg/s. Kinetic and potential energy changes are negligible. The power output of the turbine in MW is

Mechanical Engineering Practice Paper 1 Questions & Answers

8. The following are the data for two crossed helical gears used for speed reduction: Gear I : Pitch circle diameter in the plane of rotation 80 mm and helix angle 30o Gear II : Pitch circle diameter in the plane of rotation 120 mm and helix angle 22.5o If the input speed is 1440 rpm, the output speed in rpm is

Mechanical Engineering Practice Paper 1 Questions & Answers

9. A solid disc of radius r rolls without slipping on a horizontal floor with angular velocity ω and angular acceleration α. The magnitude of the acceleration of the point of contact on the disc is

Mechanical Engineering Practice Paper 1 Questions & Answers

10. A thin walled spherical shell is subjected to an internal pressure. If the radius of the shell is increased by 1% and the thickness is reduced by 1%, with the internal pressure remaining the same, the percentage change in the circumferential (hoop) stress is